1. The George Washington University School of Medicine and Health Science, Washington, DC, USA
2. The George Washington University Medical Faculty Associates, Washington, DC, USA
3. Livingston Hospital and Healthcare Services, Inc, CAH, Salem, KY, USA
4. Advanced Gastroenterology, Inc, Thousand Oaks, CA, USA
5. Saint Mary Medical Center, Hobart, IN, USA
6. Internal Medicine Associates, Merrillville, IN, USA
7. Indiana Medical Research, Elkhart, IN, USA
8. Unity Surgical Hospital, Mishawaka, IN, USA
9. Hancock Regional Hospital, Greenfield, IN, USA
10. Crossville Medical Group, Crossville, TN, USA
11. Cumberland Medical Center, Crossville, TN, USA